Oak Ridge firefighters investigate a report of smoke at Oak Ridge Utility District on Thursday morning. They found a hot ceiling tile and determined a light ballast had apparently failed, causing a fixture to overheat and igniting insulation paper. (Submitted photos)

The Oak Ridge Fire Department called it a “near miss.”

Firefighters responded at about 6:40 a.m. Thursday to a report of smoke at the Oak Ridge Utility District office building on South Jefferson Circle. The source of the smoke was initially believed to be a motor on a heat and air unit that had failed, but fire crews using a thermal imaging camera located a hot ceiling tile in an office, an ORFD press release said.

“It appears that a light ballast had failed, causing the fixture to overheat, which ignited the paper backing on the insulation lying directly on top of the recessed light,” the release said. “The paper burned along the insulation for approximately five feet until the insulation came into contact with a sprinkler pipe, where it self-extinguished. There was no damage, smoke or water, to the building, and the burned insulation was removed by the firefighters.” [Read more…]